Table 1: Nickel concentration (mg*kg−1 of the dry sample) in soil and Eisenia fetida exposed to nickel. Bioaccumulation factor (BAF) was calculated from the obtained experimental values. Ni concentration in control conditions (K) was below the threshold of determination (btd).

Experimental group

Gastrointestinal tract

Body wall

Whole body

Soil

Mean ± SD ()

Mean ± SD ()

Mean ± SD ()

Mean ± SD ()

K

btd (6)

btd (13)

btd (16)

btd (4)

Ni300

3,07 ± 0,78 (9)BAF = 0,012

0,66 ± 0,14 (12)BAF = 0,002

3,27 ± 0,12 (11)BAF = 0,012

265,38 ± 10,78 (4)

Ni900

14,95 ± 2,02* (9)BAF = 0,017

2,48 ± 0,39* (12)BAF = 0,003

5,12 ± 0,48 (12)BAF = 0,006

857,57 ± 10,18 (4)

Abbreviations are explained in Section 2. Asterisk *indicates the statistically significant differences between Ni300 and Ni900 groups in the analysed organs.